A Multimode GSM/DCS/WCDMA Double Loop Frequency Synthesizer

Badets, Franck; Camino, L.; Rieubon, Sébastien; Divel, T.; Cerisier, P.; Dedieu, S.; Belot, Didier

doi:10.1109/asscc.2005.251700

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…In the perspective of aggressive system integration, a broad-band frequency synthesizer that generates the local oscillator (LO) at all the required frequencies is a key block of a multistandard transceiver [1][2][3]. However more efficient solutions can be envisioned, taking advantage of the fact that different standards call for frequency synthesizers with different specifications.…”

Section: Introductionmentioning

confidence: 99%

A local oscillator for WCDMA band VII based on frequency multiplication

Gerosa

Bevilacqua

Neviani

2012

Analog Integr Circ Sig Process

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This work explores the generation of a local oscillator for WCDMA band VII based on frequency multiplication of a GSM reference. The frequency multiplier is based on a PLL, which includes a compact VCO based on a ring oscillator. A proper PLL design allows to sufficiently reject the relative high VCO phase noise, complying with the WCDMA requirements. The effectiveness of the proposed approach is proved with the design of the whole multiplier in a 90 nm CMOS technology. The generated oscillation ranges from 3 to 6 GHz, while the simulated phase noise is −120 and −144 dBc/Hz at a frequency offset of 0.6 and 20 MHz, respectively, dissipating 6.3 mW

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Section: Introductionmentioning

confidence: 99%